(1993). Proper cleaning and sanitizing.
Lua i Stíl Chicago (17ú heag.)Proper Cleaning and Sanitizing. 1993.
Lua MLA (9ú heag.)Proper Cleaning and Sanitizing. 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)